If he didn't know what you looked like (i.e. met online etc..) then he's just saying how he feels about how you look...like any normal person would. If he has seen you before these, he may be giving you a comment in a flirty way...

What Girls Said 2

Anonymous

While sending pictures of a sexual nature (which I assume these are) is NEVER a good idea, his responses indicate pleasure. Which, duh! Any guy will get pleasure from a sexual image of a female...unless he's gay or something.